Single Iron Generation
Used Callaway X-20 Single Irons
2006
The Progressive Wall Reduction System thinned the cavity wall by different amounts through the set, dropping the centre of gravity lower than the X-18 and doing it more in the long irons than the short. A Tour version replaced the old Pro Series here.
Overview
The Callaway X-20 single iron range comes in 2 variants: Standard and Tour.
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X-20 in other club types
Release timeline
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